Testing device for axle box bearing of heavy-load railway wagon

Abstract

The utility model discloses a heavy haul railway wagon axle box bearing test device comprising a core shaft, a thickening ring is coaxially arranged at the center of the core shaft, and the outer circumferential wall of the thickening ring is integrally connected with a poly V-belt used for being in transmission cooperation with an external driving device. Test seats used for being in linkage fit with an external radial loading piece to bear radial loads are arranged at the two ends of the mandrel, test holes allowing the mandrel to penetrate through are formed in the test seats, a to-be-tested bearing is connected between the test holes and the mandrel, and test accompanying seats are arranged between the two ends of the mandrel and the center of the mandrel; a connecting shaft which is used for enabling the two accompanying test seats to be coaxially aligned and transmitting and dispersing acting force when the accompanying test seats are stressed is detachably connected between the two accompanying test seats, accompanying test holes for the core shaft to penetrate through are formed in the accompanying test seats, and accompanying test bearings are connected between the accompanying test holes and the core shaft. According to the utility model, the problems in the prior art that a heavy-load railway wagon axle box bearing test tool is easy to generate force offset and core shaft fracture under a high-rated load clamping test are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing detection tooling, in particular to a heavy-load railway freight car axle box bearing test device. Background Art

[0002] Railway freight cars carry heavy goods, and the corresponding axle box bearings need to withstand large loads. In the prior art, the heavy-duty railway freight car axle box bearing test tooling uses high radial loads and axial loads to simulate the stress conditions of the bearings during actual operation, so that the tooling seat and the core shaft will be subjected to excessive loads during the test. However, the current heavy-duty railway freight car axle box bearing test tooling drives the bearing to be tested to operate through the core shaft. Under the high radial load and axial load, the core shaft is prone to breakage, that is, when the tooling seat and the bearing to be tested are subjected to stress, the weak points of the entire shaft system are concentrated in the middle of the core shaft, resulting in the breakage of the core shaft. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a heavy-duty railway freight car axle box bearing test device to solve the problems in the existing technology that the heavy-duty railway freight car axle box bearing test tooling is prone to force deviation and core shaft breakage under high load support tests.

[0004] To achieve the above-mentioned purpose, the utility model provides a heavy-duty railway freight car axle box bearing test device, including a mandrel, a thickening ring is coaxially arranged at the center of the mandrel, the diameter of the thickening ring is larger than the diameter of the mandrel, and the thickening ring is integrally made with the mandrel, a multi-V belt for transmission cooperation with an external driving device is integrally connected to the outer peripheral wall of the thickening ring, both ends of the mandrel are provided with a test seat for linkage cooperation with an external radial loading member to bear a radial load, a test hole for the mandrel to pass through is opened on the test seat, a bearing to be tested is connected between the test hole and the mandrel, a test seat is arranged between the two ends of the mandrel and the center of the mandrel, a connecting shaft for aligning the two test seats coaxially and transmitting and dispersing the force when the test seats are subjected to force is detachably connected between the two test seats, a test hole for the mandrel to pass through is opened on the test seat, and a test bearing is connected between the test hole and the mandrel.

[0005] The benefits of adopting the above technical solution are: in the above technology, a thickening ring is coaxially connected to the center of the core shaft, and the diameter of the thickening ring is larger than the diameter of the core shaft. The thickening treatment of the center part of the core shaft is achieved by the integral connection of the thickening ring and the core shaft, thereby increasing the stress strength of the center part of the core shaft, and the thickening ring is integrally connected to a multi-V belt for transmission cooperation with an external driving device, that is, the rotation of the core shaft is achieved by linkage cooperation with an external motor or motor through the multi-V belt, and then the operation of the bearing to be tested and the companion test bearing is driven by the core shaft to simulate the actual operating conditions of the bearing. In the above technology, the multi-V belt and the core shaft are integrated to improve the transmission accuracy and the strength of the core shaft at the same time, so as to avoid the core shaft being subjected to low stress strength at the center during transmission, resulting in the core shaft being long. Fracture occurs under time transmission; in the test shaft system, the part between the bearing to be tested and the test bearing is the weak point of the entire core shaft, but the test bearing is not completely rigid. When the test bearing part is replaced with a bearing support fixture, that is, replaced with a non-rigid support during the finite element analysis process, it can be analyzed that the entire weak point of the shaft system is in the middle position of the core shaft. Therefore, a connecting shaft is connected between the two test seats to conduct and disperse the force between the test seat and the test seat when it is too large, so as to avoid excessive force between the two causing excessive force on the center of the core shaft, and then causing the core shaft to break; in the above technology, the setting of the test bearing and the test seat plays a supporting role, and at the same time simulates the installation condition of the support component when the bearing to be tested is actually running.

[0006] The utility model is further configured as follows: guide holes are provided on the two test seats, the two guide holes are coaxially aligned, the two ends of the connecting shaft are respectively plugged and matched with the two guide holes, and the opening direction of the connecting shaft is consistent with the opening direction of the core shaft.

[0007] The benefits of adopting the above technical solution are: in the above technology, two guide holes are respectively inserted at both ends of the connecting shaft, and a stable connection between the connecting shaft and the guide holes is achieved through the gravity of the test seat itself, thereby realizing force transmission between the two test seats. At the same time, the setting of the connecting shaft is used to ensure the coaxiality of the two test seats, thereby improving the accuracy of the shaft system. At the same time, there is no need to adjust the coaxiality when installing the bearing, thereby improving the installation efficiency.

[0008] The utility model is further provided that: the diameter at the center of the mandrel is larger than the diameter at the end of the mandrel.

[0009] The benefits of adopting the above technical solution are: in the above technology, the diameter at the center of the core shaft is larger than the diameter at the end of the core shaft, thereby increasing the force strength at the center of the core shaft. When the load at the end of the core shaft is transmitted to the center of the core shaft or acts on the center of the core shaft, the core shaft will not break, thereby increasing the service life of the core shaft.

[0010] The utility model is further provided with: sealing plates which are detachably provided on the outer sides of the two test seats and are used to cooperate with external axial loading parts to bear axial loads; a plurality of mounting bolts are connected between the sealing plates and the test seats; and the sealing plates are coaxially aligned with the core shaft.

[0011] The benefits of adopting the above technical solution are: in the above technology, a sealing plate is detachably provided on the outside of the test seat, and the sealing plate cooperates with the external axial loading member to apply an axial load to the core shaft through the sealing plate when the axial loading member is used, so as to simulate the actual operation of the bearing under axial load. At the same time, the sealing plate is quickly connected to the test seat through the mounting bolts, which facilitates the centering of the shaft system and reduces the difficulty of installation. That is, during installation, the sealing plate is removed and the bearing to be tested is installed into the test seat. After installation, the sealing plate can be directly installed. The whole installation process is quick and easy and there is no need to disassemble the entire tooling, thereby improving the installation efficiency and not affecting the overall accuracy of the tooling.

[0012] The utility model is further arranged that: sealing assemblies are arranged at the openings at both ends of the test hole, two of the sealing assemblies are combined to form a seal for the test hole, the two sealing assemblies are combined with the inner circumferential wall of the test hole and the outer circumferential wall of the core shaft to form a test cavity for the operation of the test bearing, and an oil return hole for connecting with the oil outlet pipeline of an external oil supply device is opened on the test seat, and the oil return hole is connected to the test cavity.

[0013] The advantages of adopting the above technical solution are as follows: in the above technology, the sealing of the test hole is achieved by a sealing assembly, and the oil return hole is provided to connect with the external oil outlet pipeline and input and output lubricating oil into and out of the test cavity, forming a lubricating oil circuit, realizing lubrication circulation, and avoiding oil collection in the test cavity.

[0014] The utility model is further configured that: temperature measuring holes are provided on the two accompanying test seats and the two test seats.

[0015] The advantages of adopting the above technical solution are: the setting of the temperature measuring holes in the above technology facilitates temperature detection of the test seat and the test seat, so that the external temperature control equipment can heat up or cool down the tooling, thereby simulating the actual operating temperature conditions of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the utility model;

[0017] Figure 2 This is a cross-sectional view of the utility model;

[0018] Figure 3 It is a three-dimensional view of the connection state of the test seat in the utility model;

[0019] Figure 4 This is a simple cross-sectional view for analyzing the stress condition of the utility model. DETAILED DESCRIPTION

[0020] The utility model provides a heavy-duty railway freight car axle box bearing test device, comprising a mandrel 1, a thickened ring 11 is coaxially arranged at the center of the mandrel 1, the diameter of the thickened ring 11 is larger than the diameter of the mandrel 1 and the thickened ring 11 is integrally formed with the mandrel 1, a multi-V belt 12 for transmission cooperation with an external driving device is integrally connected to the outer peripheral wall of the thickened ring 11, both ends of the mandrel 1 are provided with a test seat 2 for linkage cooperation with an external radial loading part to bear a radial load, and a test seat 2 is provided for A test hole is provided through the mandrel 1, a bearing 21 to be tested is connected between the test hole and the mandrel 1, a test seat 3 is provided between the two ends of the mandrel 1 and the center of the mandrel 1, a connecting shaft 31 for coaxially aligning the two test seats 3 and transmitting and dispersing the force when the test seats 3 are subjected to force is detachably connected between the two test seats 3, a test hole for the mandrel 1 to pass through is provided on the test seat 3, a test bearing 32 is connected between the test hole and the mandrel 1, and a guide hole 3 is provided on the two test seats 3 3, the two guide holes 33 are coaxially aligned, the two ends of the connecting shaft 31 are respectively plugged and matched with the two guide holes 33, the opening direction of the connecting shaft 31 is consistent with the opening direction of the core shaft 1, the diameter of the center of the core shaft 1 is larger than the diameter of the end of the core shaft 1, and the outer sides of the two test seats 2 are detachably provided with a sealing plate 4 for linkage with an external axial loading member to bear the axial load, and a plurality of mounting bolts 41 are connected between the sealing plate 4 and the test seat 2, and the sealing plate 4 is coaxially aligned with the core shaft 1 The test holes are arranged in parallel, and sealing components 13 are arranged at the openings at both ends of the test holes. The two sealing components 13 are combined to form a seal for the test holes. The two sealing components 13 are combined with the inner peripheral wall of the test hole and the outer peripheral wall of the core shaft 1 to form a test cavity 131 for the operation of the test bearing 32. The test seat 3 is provided with an oil return hole 132 for communicating with the oil outlet pipeline of the external oil supply equipment. The oil return hole 132 is connected to the test cavity 131. The two test seats 3 and the two test seats 2 are provided with temperature measuring holes 14.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A heavy-duty railway freight car axle box bearing test device, characterized in that: The invention comprises a core shaft, a thickening ring is coaxially arranged at the center of the core shaft, the diameter of the thickening ring is larger than the diameter of the core shaft and the thickening ring is integrally made with the core shaft, a multi-V belt for transmission cooperation with an external driving device is integrally connected to the outer peripheral wall of the thickening ring, test seats for linkage cooperation with an external radial loading member to bear radial loads are arranged at both ends of the core shaft, a test hole for the core shaft to pass through is opened on the test seat, a bearing to be tested is connected between the test hole and the core shaft, a test seat is arranged between both ends of the core shaft and the center of the core shaft, a connecting shaft for coaxially aligning the two test seats and transmitting and dispersing the force when the test seats are subjected to force is detachably connected between the two test seats, a test hole for the core shaft to pass through is opened on the test seat, and a test bearing is connected between the test hole and the core shaft.

2. A heavy-duty railway freight car axle box bearing test device according to claim 1, characterized in that: The two test seats are both provided with guide holes, the two guide holes are coaxially aligned, the two ends of the connecting shaft are respectively plugged and matched with the two guide holes, and the opening direction of the connecting shaft is consistent with the opening direction of the core shaft.

3. A heavy-duty railway freight car axle box bearing test device according to claim 1, characterized in that: The diameter at the center of the mandrel is larger than the diameter at the end of the mandrel.

4. A heavy-duty railway freight car axle box bearing test device according to claim 1, characterized in that: The outer sides of the two test seats are detachably provided with sealing plates for cooperating with external axial loading members to bear axial loads. A plurality of mounting bolts are connected between the sealing plates and the test seats, and the sealing plates are coaxially aligned with the core shaft.

5. A heavy-duty railway freight car axle box bearing test device according to claim 1, characterized in that: Sealing assemblies are provided at the openings at both ends of the test hole. The two sealing assemblies are combined to form a seal for the test hole. The two sealing assemblies are combined with the inner circumferential wall of the test hole and the outer circumferential wall of the core shaft to form a test cavity for the operation of the test bearing. The test seat is provided with an oil return hole for connecting with the oil outlet pipeline of the external oil supply equipment, and the oil return hole is connected to the test cavity.

6. A heavy-duty railway freight car axle box bearing test device according to claim 1, characterized in that: The two accompanying test seats and the two test seats are all provided with temperature measuring holes.

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